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NEW YORK (CBSNewYork/AP) — A court document shows the suspected killer of three men found shot in a luxury car in Harlem said he thought about turning himself in.

Roberto Nunez pleaded not guilty Tuesday to murder in the June 7 shootings. He was arraigned on first and second degree murder charges in the shooting deaths of 30-year-old Amaury Rodriguez, 26-year-old Heriberto Suazo and 25-year-old Louis Catalan.

A passer-by found the bodies in a parked BMW on a street near Columbia University. Surveillance video showed a man calmly walking away from the car.

According to charging documents and statements made in court, Nunez was in the backseat of the vehicle before he shot the men with a .38-caliber revolver.

The 30-year-old was arrested 16 days later in a Bronx apartment.

A court document released Tuesday says Nunez told a detective he’d seen himself on TV and planned to turn himself in shortly.

His lawyer declined to comment.

(TM and Copyright 2012 CBS Radio Inc. and its relevant subsidiaries. CBS RADIO and EYE Logo TM and Copyright 2012 CBS Broadcasting Inc. Used under license. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. The Associated Press contributed to this report.)